Answer :
Koalas B. fur color closely matches the eucalyptus bark color. Koala's have fur that is gray to light brown and it helps them camouflage themselves so they cannot be seen.
The correct answer is (B) fur color that closely matches.
Koalas and marsupials are now mostly found on the eucalyptus trees in most of the region of Australia. Earlier their ancestors used to live on the ground but because of the adaptation they spend most of the time on trees. For this reason their hands and feet have strong claws and opposite digits but just because they spend most of time on trees another adaptation took place. That adaptation is fur color that closely matches the eucalyptus bark color. This helped them to hide easily and protect themselves from prey.